Desk Tricolor Temperature Learning Reading Lights, Style: USB Direct Plug (White) 1. Input voltage: DC 5V 2. Power supply mode: USB direct plug, built-in 2000mAh 18650 lithium battery for charging 3. Color temperature: 3000K+6000K 4. Number of lamp beads: 3000K 21LEDs+6000K 21LEDs 5. Material: PC, ABS 6. Remote control power supply: a CR2025 button battery (not included) 7. Lighting angle: 120 degrees 8. Lamp bead model: 2835 9. Weight: about 140 grams for USB direct plug, about 160 grams for charging 10. Size: about 28.5x4 cm Features: 1. Three color temperatures (natural whitecool whitewarm white), switch at will 2. One key touch, stepless dimming, switch color temperature 3. The lamp and the base are magnetically fixed, and the lighting angle can be adjusted 4. Efficient light emission is brighter, the light is abundant, and the lighting effect is good 5. With remote control for remote operation, the brightness of lamps can be adjusted and the color temperature can be changed 6. USB direct plugcharging method, easy to use 7. High-brightness optical LED chip, low light decay, uniform light, durable 8. Acrylic light transmission cover, strong light transmission performance, soft light does not hurt the eyes, durable